 Ribes divaricatum (Spreading Gooseberry), Grossulariaceae, Per/Shrub:Mar-May, coastal scrub, redwood and mixed evergreen forest |
 Rosa californica (California Wild Rose),Rosaceae, Per/Shrub: May-Aug, chaparel |
 Rubus ursinus (California Blackberry) Rosaceae: Vine/Shrub:Feb-May, forest, riparian |
 Salicornia pacifica (Pickleweed) Chenopodiaceae, Perennial: July-Nov, salt marsh |
 Sanicula arctopoides(Footsteps of Spring), Apiaceae: Perennial:Feb-May, coastal scrub and mixed forest |
 Sanicula crassicaulis(Pacific Sanicle), Apiaceae, Perennial: Feb-Apr, forest, grassland, chaparell |
 Sambucus nigra (Black Elderberry), Adoxaceae, Per/Shrub: Mar-May, |
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 Sambucus racemosa var. racemosa (Pacific Red Elderberry), Adoxaceae, Per/Shrub:July-Aug, coastal scrub and redwood forest |
 Scrophularia californica(Bee Plant), Scrophulariaceae, Perennial:Feb-May, coastal scrub, redwood |
 Sidalcea malviflora(Checkerbloom), Malvaceae, Perennial:May-Aug, coastal scrub |
 Sisyrinchium bellum (Western Blue-Eyed Grass) Iridaceae, Monocot, Perennial: Mar-May, scrub, foothills |